#F4FF00Busy Bee (#F4FF00) is a near-white, vivid yellow-green with an OKLCH hue of 113°, lightness 0.96 and chroma 0.214. It sits on the warm side of the color wheel. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #F4FF00 |
|---|---|
| RGB | rgb(244, 255, 0) |
| HSL | hsl(63, 100%, 50%) |
| HSV | hsv(63, 100%, 100%) |
| CMYK | cmyk(4%, 0%, 100%, 0%) |
| CIE Lab | lab(96.3 -26 93.5) |
| OKLCH | oklch(0.959 0.214 113) |
Under warm 2700K interior light Busy Bee shifts subtly: drifts toward yellow; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 2), so it is a lighting-stable choice.
#fdf800 — ΔE 2.0, shifts subtly: drifts toward yellow#fcff00 — ΔE 1.1, shifts subtly: drifts toward yellow#f4ff00 — ΔE 0.0, is virtually unchanged#f4ff0b — ΔE 0.1, is virtually unchangedTest Busy Bee in the color lighting simulator — sweep it through daylight, warm 2700K light, 4000K LED, and shade alongside the rest of your palette.
Against white it measures 1.1:1 and against black 19.15:1, so black text is the stronger pairing. That pairing passes WCAG AA for body text. Avoid white text on this color entirely.
One color explored: close hues with real lightness and chroma structure, so the palette is the anchor through value rather than a set of colors.
#f4ff00 · #cbd500 · #a4ab00 · #7e8400 · #5a5f00 · #393c00
The anchor's neighbours on the wheel — everything shares an undertone, so the chord carries color without anything having to be muted to get along.
#f4ff00 · #ffdd2e · #ffbe33 · #ff9d1e · #f97c2a · #e5644a
The mid-gap pairing — sage and mustard, terracotta and olive. A foil rotated 40–65° toward warm or cool: too far to be kin, too near to argue, carried by temperature and a deliberate value offset.
#f4ff00 · #68c6a0 · #939a00 · #008963 · #595d00 · #004933
One deliberately opposed voice — a single restrained counterpoint across the wheel, or temperature against temperature where the anchor is too muted to carry a loud opposite.
#f4ff00 · #cdd3a3 · #abb255 · #7543d8 · #4b4f00 · #2e3100
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f4ff00 · #d4d1e7 · #94977a · #595766 · #252705 · #010006
This color as a ground rather than a subject — its own restraint held across a narrow value band, carrying one saturated voice from the opposite temperature.
#f2f0fc · #c9c7d4 · #9c99a9 · #231f31 · #04020e · #f4ff00
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#f4ff00 · #c9e4c6 · #7fb27e · #227de5 · #333459 · #051218
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#f4ff00 · #b7e7ef · #da74d6 · #6570a0 · #3a3551 · #041305
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#f4ff00 · #aadcf8 · #00a1da · #a10063 · #480029 · #00060f
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f4ff00 · #a2e1e7 · #00a8b3 · #642cc2 · #4d0008 · #030011
#F4FF50 · #F4FE72 · #F4FD8D · #F4FDA4 · #F4FBB9
#C6CF00 · #9BA200 · #717700 · #4A4E00 · #262900
#F3FD6A · #F2FB98 · #F1F8BC
Its moderate chroma lets it work in mid-size areas — upholstery, secondary UI surfaces, editorial blocks — without overwhelming neighbors. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.